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#include "plugin.h"
#include <gfx/asset.h>
#include <gfx/render_backend.h>
#include <gfx/renderer.h>
#include <gfx/scene.h>
#include <gfx/util/geometry.h>
#include <gfx/util/shader.h>
#include <math/camera.h>
#include <assert.h>
#include <stdlib.h>
// Default texture to load if no texture is provided.
static const char* DEFAULT_TEXTURE = "/assets/skybox/clouds1/clouds1_west.bmp";
// static const char* DEFAULT_TEXTURE = "/assets/checkerboard.jpg";
struct State {
Scene* scene;
SceneCamera* camera;
};
bool init(Game* game, State** pp_state) {
assert(game);
assert(pp_state);
State* state = calloc(1, sizeof(State));
if (!state) {
goto cleanup;
}
// Usage: [texture file]
const char* texture_file = game->argc > 1 ? game->argv[1] : DEFAULT_TEXTURE;
RenderBackend* render_backend = gfx_get_render_backend(game->gfx);
const Texture* texture = gfx_load_texture(
game->gfx, &(LoadTextureCmd){
.origin = AssetFromFile,
.type = LoadTexture,
.filtering = LinearFiltering,
.mipmaps = false,
.data.texture.filepath = mstring_make(texture_file)});
if (!texture) {
goto cleanup;
}
ShaderProgram* shader = gfx_make_view_texture_shader(render_backend);
if (!shader) {
goto cleanup;
}
Geometry* geometry = gfx_make_quad_11(render_backend);
if (!geometry) {
goto cleanup;
}
MaterialDesc material_desc = (MaterialDesc){.num_uniforms = 1};
material_desc.uniforms[0] = (ShaderUniform){
.type = UniformTexture,
.value.texture = texture,
.name = sstring_make("Texture")};
Material* material = gfx_make_material(&material_desc);
if (!material) {
goto cleanup;
}
const MeshDesc mesh_desc =
(MeshDesc){.geometry = geometry, .material = material, .shader = shader};
Mesh* mesh = gfx_make_mesh(&mesh_desc);
if (!mesh) {
goto cleanup;
}
SceneObject* object =
gfx_make_object(&(ObjectDesc){.num_meshes = 1, .meshes = {mesh}});
if (!object) {
goto cleanup;
}
if (!(state->scene = gfx_make_scene())) {
goto cleanup;
}
SceneNode* node = gfx_make_object_node(object);
if (!node) {
goto cleanup;
}
SceneNode* root = gfx_get_scene_root(state->scene);
if (!root) {
goto cleanup;
}
gfx_set_node_parent(node, root);
if (!(state->camera = gfx_make_camera())) {
goto cleanup;
}
*pp_state = state;
return true;
cleanup:
shutdown(game, state);
if (state) {
free(state);
}
return false;
}
void shutdown(Game* game, State* state) {
assert(game);
if (state) {
gfx_destroy_camera(&state->camera);
gfx_destroy_scene(&state->scene);
// State freed by plugin engine.
}
}
void render(const Game* game, const State* state) {
assert(game);
assert(state);
Renderer* renderer = gfx_get_renderer(game->gfx);
gfx_render_scene(
renderer, &(RenderSceneParams){
.mode = RenderDefault,
.scene = state->scene,
.camera = state->camera});
}
void resize(Game* game, State* state, int width, int height) {
assert(game);
assert(state);
const R fovy = 90 * TO_RAD;
const R aspect = (R)width / (R)height;
const R near = 0.1;
const R far = 1000;
const mat4 projection = mat4_perspective(fovy, aspect, near, far);
Camera* camera = gfx_get_camera_camera(state->camera);
camera->projection = projection;
}
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